All data are in degrees Fahrenheit

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Water temperature in Fukuoka

Detailed information about the current water temperature in Fukuoka. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.
Sea temperature in Fukuoka now

78.4

°F

September 18, 15:30

Trend:

decreasing

Yesterday:

78.8°F

Tomorrow:

78.0°F

Sunrise:

06:03

Sunset:

18:22

Day Length:

12 h. 19 min.

Fukuoka in September

Minimum:

56.7°F

Average:

58.8°F

Maximum:

61.0°F

Sea water temperature in Fukuoka today

As of now, in Fukuoka, the water temperature is 78.4°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 1.4°F lower than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to fall a bit.

Recent sea temperature and forecast

Today's water temperature is considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 85.0°F on 2025, while the historical minimum was 77.1°F on 2016.

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the maximum recorded over the past years. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 76.9°F, the minimum temperature may reach 75.9°F, and the maximum might stay at 78.0°F.

Daily water temperature in Fukuoka

Date Current Year

actual* / forecast**

last year 10 years average
Sep 4 84.4°F 85.4°F 81.5°F
Sep 5 84.1°F 84.7°F 81.4°F
Sep 6 83.5°F 84.0°F 81.2°F
Sep 7 82.7°F 85.7°F 81.0°F
Sep 8 82.2°F 85.5°F 80.8°F
Sep 9 81.6°F 85.3°F 80.6°F
Sep 10 81.0°F 84.7°F 80.8°F
Sep 11 80.5°F 84.4°F 80.7°F
Sep 12 80.5°F 84.0°F 80.9°F
Sep 13 80.0°F 83.8°F 80.7°F
Sep 14 80.1°F 83.4°F 80.6°F
Sep 15 79.9°F 83.0°F 80.2°F
Sep 16 79.4°F 83.7°F 80.1°F
Sep 17 78.8°F 85.7°F 80.2°F
Sep 18 78.4°F 85.0°F 79.8°F
Sep 19 78.0°F 84.1°F 79.4°F
Sep 20 77.7°F 82.8°F 79.1°F
Sep 21 77.3°F 82.1°F 78.7°F
Sep 22 77.0°F 81.4°F 78.4°F
Sep 23 76.5°F 80.8°F 77.8°F
Sep 24 76.1°F 80.2°F 77.5°F
Sep 25 75.9°F 80.6°F 77.3°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Fukuoka by month

In Fukuoka, the months July through October offer comfortable swimming conditions, which amounts to 112 swimming days.
The warmest water in Fukuoka was recorded on July 28, 2026, reaching a 88.4°F. While the coldest temperature occurred on March 10, 2025, dipping to 51.7°F. The average readings by season are 58.5°F in Winter, 60.3°F in Spring, 78.0°F in Summer, and 73.5°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Kitakyushu 80.7°F 30mi
Shimonoseki 80.0°F 39mi
Kumamoto 81.3°F 57mi
Nagasaki 81.0°F 66mi

* current water temperature in this city

** straight line distance from Fukuoka